Issues affecting advanced passive light-water reactor safety analysis

Light Water Reactor Sustainability Program Risk - Informed Safety Margin

The Pebble-Bed Modular Reactor: Safety Issues

The Bush Administration has made the expansion of nuclear power generation a centerpiece of its domestic energy policy. However, the White House has not addressed the practical issue of how to overcome the nearly three-decade-long aversion among U.S. electric utilities to investing in new nuclear plants. In today's deregulating market, utilities will not build new nuclear power plants unless th...

Passive Decay Heat Removal for the Advanced High Temperature Reactor

This report presents a design concept for a high-capacity decay-heat removal system for the molten-salt cooled Advanced High Temperature Reactor (AHTR) [1]. The design is closely derived from the General Electric S-PRISM reactor, which is a sodium pooltype reactor [2]. The AHTR is distinguished from the S-PRISM by its use of a hightemperature thermal blanket, shown in Fig.1, that allows the ves...

Aegis: an Advanced Lattice Physics Code for Light Water Reactor Analyses

In the current light water reactor analysis, the neutronics analysis procedure is divided into two stages – the lattice physics and the core calculations. The former is to make a tabulated cross section set for the latter, commonly on the basis of homogenized fuel assemblies or fuel pincells. The latter performs simulations to obtain the neutronics characteristics of a core. Since the overall p...

Study of thorium advanced fuel cycle utilization in light water reactor VVER-440

The first step in investigation of thorium fuel is evaluation of the results obtained from the spectral code for this type of fuel. The benchmark summarized by IAEA in 2003 was used for partial validation of the code HELIOS 1.9. The benchmark was focused on a comparison of the methods and basic nuclear data. Acceptable results of benchmark comparison allowed examining and comparing different ad...